I have a copy of the New Zealand Book of Common Prayer

Snap. It was given to me by a friend of my mother when I was about eight, and despite everything it's travelled everywhere with me!

Max (as usual) has it right about "God Upend New Zealand". No one likes it. I used to play for RSA (Returned Services Association) concerts and dos, and there was always an entry in the programme which simply said "Anthem". I always took great delight in asking the president of whichever RSA I was at which key he wanted me to play "God Defend New Zealand" in. The answer was always the same: "Not that rubbish! The REAL national anthem, God Save The Queen! And in any key you like." I played once for an RSA in deepest, darkest, conservative-like-GWB-only-worse Southland and asked the same question. I shall always treasure the response: "If you play that shit, you'll get thrown out!"